Hey, if I were a God who had already lived an infinite length of time, all alone, I'd want to stretch out the evolution of the universe for as long as I could too, if only out of sheer boredom. :-)
Another theory: God was bored.
So He created the Universe.
But He was still bored, so He created plant life.
And, finding that He was still bored, He created animals.
No luck on dealing with the boredom, so He created man.
And He hasn't stopped laughing ever since!
I take it you have difficulty with the concept of space-time.